Microscopic measuring machine



M. LEVY. MICROSCOPIC MEASURING MACHINE.

APPLICATION man AUG-23} 1920.

Patented Apr. 25, 1922.

MAX LE Y;

on PHILADELPHIA, P NNSYLVANIA, ASSIGNOR 'ro nowann LIONEL F. BOTH on PHILADELPHIA, PENNSYLVANIA.

s amcaaaa of Letters Patent.

r MIcRoscorId EAsuRING MACHINE.-

Application filed 'August'23, 1920. Serial Noi4o 5j2 57. f

To aZZ whom, it may concern: ,7

Be it known that 1, MAX LEVY, a citizen of the United States of America, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have in vented certain new anduseful Improve-. ments in Microscopic Measuring Machines, of which the following is a specification.

'The. object of this invention is: to provide an improved measuring instrument which is simple :and effective for quickly and accurately ascertaining the thickness of an object when placed upon a plane surface" tor-table to be engaged by a contact polnt with which is associated a scale-bar, the bar being maintained by a frame'which is connected by springs or flexible supports ,to a carriage that is adjustable upon a stand which carries 1 a microscope forreadingv the lines or rulings of the scale-bar, to =-deter-' mine the gage, of 'an' object. on the table ahdengaged-by :thej-contactpoint'; v i Theinvention may be said to comprise a I stand that; is pi'jovided'wi-th a plane sur-.

face, a microscope having its axis parallel'to the surface upon which the object-to be measured is placed, an adjustable carriage associa'ted with the' -stand-the same main-H taining resilient means for supporting a contact point andpa scale-bar, as will'be contact micrometer. l

The-accompanylng drawmgs illustrate a hereinafter set forth, to provide arsliding Vmicroscopic measuring instrumentor "sliding contact micrometer which embodies .a

preferred form of my invention, and in Figurel, isfa side .elevationyFigyII, .is'

a rear view, Fig. III; is a front elevation" of the carriage-and scale-bar, detached from V the' stand. Fig. IV, is a transverse section,

and F ig.-V, shows detail views. ofs'an in side gageattachment. v n Referring'to the drawings, 1 indicates a base to-which is attached .eitherdirectly-or indirectly an upright column or'stand 2 having a vertical face that providediwith a rack 3;. andxa islideway-rt'hat may consistof dovetailed tenons to maintain inmovable engagement with the stand a 'carriagetj having a mortise with'bevelled .edgesaand a recess to receive a part of apinion 5 which engages the rack- 3, the. pinion being at tachecl to a shaft which is carried'by bear? ings which are vmaintained bythecarriage and at .a suitable distance beyond the carriage the shaftisprovided with a milled head 28 for manually turning the shaftand its pinion to raise and lower the carriage.

The carriage 4 has attached thereto cross.

pieces 66 to which are securedflat springs or plates 77 and it is also providedwith' an arm or bracket that carries asst-screw;

8 for engagement with the underside of one-0f the springs to provide a rest or noneresilient support for the parts carried by:

a LEVY we '7 Patented Aprr a the outerf ends of the spring plates, .when i the measuring instrument isnot in use, or to adjust the partscarried by the springs v 710' the outer ends of thesprings there is se-Y cured a frame 9, that comprises-bars 10 to;

to a substantially,horizontalposition--1 0 which .are attached the outer ,ends-toffthe springs '7 and a plate 11 havingflugs 12, a

1 3'which impingeuponascale-bar l ito asv sociatei the "same with the carriage andto pair of the lugs carrying clamping screws provide means for adjusting the same. a

fine'horizontal graduations or rulingswhich extend longitudinally either I the entire The; scale.-bar is provided withextremely lengthI'of the bar-orgonly ';upon a portionthereof to, suit the "requirements of the measurements to bemadeand -readbyuse of the microscope. '-The carriage-is provided below the lower end of ithescale-bar withablock that carries acontact point 15 ifor engagement with'the face of an object-t0 be measured; such: ob ect being. placed iupon the tablejoranvilglfi ofthe base.

object may be removably attached totth e base and it may be apertured-at different points to receive pins or stops-when the device is used to measure plane surfaces or projections on surfaces or recesses therein. The apertures in the plate or; table 16 may also serve to carry sockets or supports for bars or tubes or the :like in measuringjthe length thereof 1 that the same may be raised onlowered,

, the scale-bar is adjustablyi attached'thereto,

and the :springs maintai-n the scale-bar: in parallelism with the face o-fthe stand and 9 j The table, anvil or support 1'6- fornthe will ipress-the contact 'point-upon ithe- 0bject to beameasure'd; -It willi beynoted t hat.

the'construction of the carriage-is such that I the scale-bar is"p0siti0ned-t0one sideof" v I the slideway.; i

i .1 100.. .The construction ofjthe carriage is such The stand 2 has associated therewith a microscope 17 that is maintained to be in line with the graduations of the scale-bar, the microscope is provided with the usual adjusting screws or clamps, as well as cross hairs or lines 18 when desired, and for the purpose of illumination the microscope has within its tube a transparent reflector or mirror 18, and in line therewith an offset chamber or tube 19 for an incandescent electric lamp, the light therefrom being thrown upon the reflector and deflected forward upon the graduations of the scale-bar so that the same may be read, and at the same time rendering distinct the cross hairs or lines 18" located within the microscope.

The base has attached thereto a hollow handle 20 the same being adapted to have placed therein a dry cell or storage battery 21 which is connected with an electric lamp by suitable connections including a circuit maker and breaker of the usual type, as a push button 22 on the top of the battery 21.

The instrument herein described and illustrated may be modified as to details of construction, and in the form shown may be used to ascertain with microscopic precision the thickness of an object when placed upon the table and engaged by the contact point, the amount of pressure of the contact point upon an object being determined eitherby the adjustment of the carriage or by the set screw 8. a

By providing a resilient support for the contact point the same may be readily raised to; permit an object beneath the same, to determine for instance the gage of metals, pa-

per, glass, or the thickness of parts thereof.

The instrument is of such construction that provision is made for setting the carriage by a test block placed upon the table as well as the scale-bar to accord with the tempera- 'tu-re and other factors to insure accurate measurements or comparisons, and the spring supported frame that forms a part of the carriage to which thescale-bar is attached may be used to maintain other graduated measuring devices, as a rule, protractor, depth-gage, or other appliance having graduations which are usually read by a microscope havinga position indicator.

The drawings illustrate a microscope which is held by the stand and is adjustable toposition its tube at right angles to the graduated face of'the scale-bar which microscope has the usual adjustments or set screws and clamps.

The sliding rod or depth-gage 23, is adj'ustablysecured to the frame 9 which is a part of the carriage 4, and has guide lugs, one of the lugs 24 being of the clamp-type or sl-itted' so that its aperture can. be reduced to clamp. the gage bar 23: when the shouldered screw is turned by means of the milled head '5 of the screw.

I iivot it will en 'age an underside of an u 761 member of the carriage, the stop and the cam providing means for locking the scale bar carrying frame so that the scale bar will be movable with the carriage. lVhen the cam is in the POSllLlOll' SllOlVIl by Fig. III,

the scale bar will have a limited vertical movement independent of the spring supports which-may beheld in a fixed position by turning the thumb nuts 31 and 32 that engage with the screw having a milled head 8; I Y a The contact point 15'that is associated with the lower end of the scale bar, or with its supporting frame, or the bar 23, are either adapted to have attached thereto adjacent to their lower ends, an inside gage 29, :the'

contact point 30 thereof projecting" at right angles to engage with the inside of an object. V 1 The "construction and the means for adjusting the microscope may be varied it be' ing desirable toprovide thesame with means to vary the position. of its axis both verticall'y and horizontally'to bring'its axis in line with the microscopic lines of the scale bar.

I claim.

1. In a preclsion'measuring instrument,

a stand or support provided with a movable carriage, a- 'scale-bar and a contact member maintained in resilient engagement with the carriage. I i j Y 2. In a precision measuring instrunienna" base, a stand or support attached to the base, a microscopemaintained by the stand, a can riag'e adj uistably associated with'the stand and provided with a resiliently supported contact member and a scale-bar. I I In a precision measuring instrument for use with a scale having microscopic graduations thereon, a stand, a microscope maintained by the stand, a carriage in movable engagement with the stand, resilient members attached to .the carriage, adjustable means for maintaining a scale-bar attached to the resilient members to position the graduatio-ns of the scale-bar inline with the longitudinal axis of tlie micro'scope and a contact member below the scale-bar.

'4. In a precisioni'measuring instrument, a base provided with an object supporting table and a stand which maintains a microscope said stand having out of linewith the microscope ways fora slidable ca'rri-age,a s-lidable carriage associated with the stand, flexible: supports -,that.cmaintain a frame, a

graduated bar carried by the frame and maintained in line with the microscope, and

a contact member also carried by the frame. 5. In a device for the purpose set forth, a

portable precision ,measuring instrument,

comprising a base or stand providedwith a table, a detachable upright, amicroscope maintained by the stand, a reflector, abattery, and an electric lamp as accessories of the microscope, a handle associated wlth-the base and adapted to serve as a receptacle for the battery, means forconnecting the battery with the lamp, a carriage movably attached to the upright, and a scale bar maintained in flexible engagement with the car-.

slidable upon said support, a graduated scale and a contact point associated with the carriage, means for flexibly associating the graduated scale and the contact point with the carriage, and means for limiting down ward flexure of the carrierfor th'e'graduated scale and the contact point.

7. In a precision "measuringinstrument, a" ii 1 base provided Witha table and a stand provided with a microscope, a Way fora movable carriage located to one side of thelongi' tudinal axis of the microscope, a carriagefor sald stand, springs attached to the carriage, a graduated scale, a support for the graduated scale attached to the springs and extending to one side thereof to locate the scale in line With the microscope, a contact member carried by the support, and means on the carriage for limiting the flexure of MAX LEVY.

the support. 

